Question

The dual pair of current is?

(a) voltage

(b) current source

(c) capacitance

(d) conductance

The question was asked during a job interview.

I'd like to ask this question from Tellegen’s theorem topic in section Useful Theorems in Circuit Analysis of Network Theory

Answer 1

Right option is (a) voltage

To explain I would say: In an electrical circuit itself there are pairs of terms that can be interchanged to get new circuits. The dual pair of current is voltage. And the dual pair of voltage is current.